Duplicating machine



April 25, 1944. o. B. ROSEN DUPLICATING MACHINE Filed May 1, 1941 3 Sheets-Sheet 1 wwmm INVENTOR. OSCAR BORJE ROSEN lsj wau a mfla ATTORNEYS April 25, 1944. Q B RQSEN 2,347,367

DUPLICATING MACHINE INVENTOR.

OSCAR BORJE. ROSEN ATTORNEYS April 1944- o. B. ROSEN DUPLICATING MACHINE 3 Sheets-sheaf 5 Filed May 1, 1941 FIG.6.

IN VENIOR.

OSCAR BORJ E ROSEN ATTORNEYS Patented Apr. 25, 1944 UNITED STATES PATENT OFFICE DUPLICATING MACHINE Oscar Borie Rosen, Detroit, Mich.

Application May 1, 1941, Serial No. 391,360

8 Claims.

The present invention relates to duplicating machines in which the cutting of the stock is controlled automatically through the action of a pattern or template on a tracer finger and more specifically to means for hydraulic operation and control of the cutting operation.

Among the objects of the invention is means by which the hydraulic pressures on opposite sides of a piston in a suitable cylinder, serving as a motor, may be directly controlled through the action of a tracer.

Another object is means by which the pattern or template, through a limited movement, controls the cutting action.

Still another object is hydraulic tracer construction which is simpler and less diflicult to construct and operate than those heretofore used.

Other objects will readily occur to those skilled in the art upon reference to the following deseription and the accompanying drawings in which Fig. 1 is a more or less diagrammatic view, partly in section, showing an adaptation of the invention to a lathe.

Fig. 2 is a plan view partly in section of the pattern or template, its mounting and action.

Fig. 3 is a section on line 2-2 of Fig. 2.

Fig. 4 is a plan view of the assembly of Fig. 2, but with the template and its mounting plate removed.

Fig. 5 is a section on line 5-5 of Fig.2.

Fig. 6 is an underside view of the template mounting plate, and

Fig. 'I is a view, with parts in section, of a tracer control device embodying some of the elements of the structure of Figs. 1 to 6.

In the drawings,-a stationary lathe bed is indicated by the angular slides Ill and a tool carriage I l shown as mounted for longitudinal movement upon the slides HI, and actuated by the conventional feed screw (not shown). The work piece is indicated in section at l2, this being supported and driven in the conventional manner. Mounted upon the tool carriage II and slidable crosswise of the carriage is a tool slide it provided with means It for mounting a tool post and tool (not shown) for acting on the work I: and which means I! may be movable relative to the slide it as by the adjusting screw l1.

At a suitable location on the slide I5 is fixed a support 20 carrying a piston rod 2| which extends into a suitable cylinder 22 mounted upon the carriage II, the axes of the cylinder 22 and rod 2| being parallel to the line of movement oi slide l5.

Also mounted upon support 26 is the control assembly, shown in detail in Figs. 2 to 6, which assembly consists briefly of a valve assembly A and a template supporting plate B, the latter being movable upon a bed C through the action upon the template of a stationary finger carried by means of suitable supporting means upon the stationary portion Ill of the lathe. Such support is indicated by the bracket and arm portion both numbered 26.

In a suitable location adjacent the lathe is provided a motor 30 to which are connected a pair of fluid pumps 3! and Sin drawing from a tank 32 and delivering the fluid under pressure through flexible conduits 33 and 33a to the valve assembly A and one end of cylinder 22, respectively.

Two other flexible conduits 34 and 35 lead from the valve assembly A to the other end of the cylinder 22 and the tank 32, respectively, while the conduit 33a is provided with a safety valve 36 adjustable to maintain a constant pressure in this conduit and its end of cylinder 22, excess fiuid flowing from the valve 36 back to tank 32 through conduit 36a.

Referring now to Figs. 2 to 6, the valve assembly A is seen to consist of a cylindrical housing 40 closed at its ends and having fitted therein a cylindrical housing 4 I. The latter is, as shown, provided with three peripheral grooves 42a, 42b, and 420, and with four grooves 43a, 43b, 43c and 42d in its inner periphery, grooves 42a and 43a being connected by a plurality of openings 44a. Likewise grooves 420 and 430 are connected by openings 44c while groove 42b connects with either 43b or 43d through openings 44b, the particular one depending upon the position of the valve plunger 45. a

The plunger 45 consists of a grooved cylindrical member having three grooves 48, 49 and ill, the intermediate one being somewhatwider than the other two,. whil the ribs between are narrower than the grooves 43a, 43b and 430 and are so located that, at an intermediate position, communication is established between e. g.. grooves 430 and the valve groove 49 and hence the passages 44b. At the ends of the valve movement, such communication is prevented.

Fluid flowing into the valve through conduit 33 will pass directly through the valve assembly from conduit 33 to 34 when the valve 45 is at either end of its movement but when the valve is moved to an intermediate position some 0! the fluid is by-passed to the end grooves lla and llc and thence to grooves lid and 42c. from which it flows through openings ii to a chamber ll to which is connected the return conduit ll.

At the outer end of the assembly A is provided an adiusting screw ll adapted to adjust the tension upon a spring ll acting upon one end oi valve ll. In the other end oi the housing is a thimble ll slidable in and out and acting against the other end of the valve ll. The open end oi the thimble is outside of the housing and the bottom of the thimble cavity is provided with a conical depression receiving the pointed end of a pin II. the other endof which is seated in a similar depression in a small plug ll set in the edge of the template mounting plate B.

The plate B on its upper side is substantially smooth plate provided with suitable means by which there may be fixed to it a template, one being shown at 80. The underside of the plate B is shown more clearly in Fig. 6 which shows the plate to be provided in its comers with shallow holes ll having conical depressions in their bottoms. These are for the purpose of receiving the taper end pins 62 oi smaller diameter than the holes. which pins serve to support the plate in spaced relation to the bed C and allow a small universal lateral movement. Plate 13 is likewise provided with slotted openings 63, the slots running lengthwise as shown. The purpose of these will be shown later.

There are also fixed to the bottom of the plate a roller ll, substantially centrally located, a fixed abutment such as the pin 65, and the substantially semi-circular block 68 having notches 61 in its straight side.

At each end of the plate is an opening in which is seated a plug ll (see Fig. to which is fixed a tension spr ng 69, the other end of the spring bclngflxedtoaplug 'llinturnflxedlnthebedC.

In the bed C are provided holes II with conical bottoms adapted to register with and coact with pins l2 to support and space plate B while the springs ll serve to hold these several parts together. As indicated in Fig. 3, the bed C is hollowed out and in the space are mounted the several parts shown best in Fig. 4.

These parts include means for compelling a parallel movement of the plate B, consisting of the bellcranks ll swinging about the pins Bi and having their longer arms connected by a link l2. The shorter arms ll of the cranks carry upwardly projecting pins 84 adapted to enter and coact with the slots ll in plate B, compelling parallel movement, whether it be lengthwise or crosswise of the bed C.

In the outer wall of the hollowed bed member and directly opposite the valve assembly A is located a slidably mounted thimble 88 urged inwardly by a spring ll, the tension of which may be adjusted through the action-oi a screw plug ll. In a conical seat in this thimble rests one end of a taper-end pin ll of less diameter than the thimble bore, the other end of the pin coacting with an angular seat in the abutment 85.

Through the action of the several pins 62 and ll and their associated parts, together with springs ll, ll and ll, the plate B is. so to speak, floated in spaced relation above the bed C and resiliently held in centered position thereover.

In addition to the parts mentioned, the bed C also carries a plate 85 which is provided in one end with a notch 96 oi which the side walls are far enough apart.to admit and coact with the roller 4 carried by the plate B. These walls are provided with oppositely arranged arcuate portions curved on a radiu slightly longer than the radius oi roller ll.

Alsoflxedinbedcareapai oispaced electric contacts Ill and Illa, and between these a pair oi spring contact arms I ll flxeq together and to a block of insulating material lli pivoted at ill. This block "2 is provided in theend beyond the pivot Ill with a laterally projecting tapered pin Ill adapted to coact with a notch l! in block ll carried by plate B. Further, opposite the pin ill and arranged to press pin I ll into its notch l1 is a spring actuated plunger Ill mounted in a block Ill. 4

The spring contact arms Ill should be so arranged that, when the block I I2 is in its central position, both contacts are made. However, pivotal movement oi the block will break the circuit by flexing one of the springs sumciently to permit the other to leave its stationary contact. The contacts Ill, Illa are connected in a circuit controlling the movement of slide II, which circut is so arranged that when closed the progress of the slide is continuous, but when broken the progress is stopped.

The assembled relation of plate 13 and bed C is shown in Fig. 2, which also indicates the operation oi the device. As indicated by this figure, when the slide II in its movement causes the template 60 to contact the stationary finger 2|, the template is moved slightly. If the movement is due to the finger meeting an abrupt surface, longitudinal movement is converted into lateral movement by the roller ll coacting with the notch in plate 95. Such movement immediately causes lateral movement of pin ill in notch l1 and thereby swings block I02 sufllciently to break the circuit through contacts Ill, Illa and stop forward progress of slide H. At the same time, such lateral movement oi plate B moves the valve 45 If, however, the pin 25 strikes a moderate slope such as is indicated in Fig. 2, the lateral movement is insufllcient to break the electric circuit but nevertheless moves the valve ll.

In initially adjusting the valve ll, the safety valve 38 and the pump operation, these are so arranged as to provide in the two ends of cylinder 22 equal pressure when a small proportion oi fluid is being by-passed through conduit ll, the -several grooves ll, 42, chamber 53 and conduit ll tothe tank.

When, therefore, the valve 45 is moved to the closed position of Fig. 2, no fluid is by-passed and hence a greater pressure will develop in the outer end oi cylinder 22 and immediately move the slide ii to the left (Fig. 1).

0n the other hand, when the valve ll is moved in the other direction (1. e., down in Fig. 2) more fluid is by-passed and hence the pressure in the outer end of cylinder 22 is reduced below that in the inner end and the slide it is therefore moved to the right (Fig. l) 7 While the foregoing description relates to the use of a movable template and fixed finger, the same principles may be used with a fixed template and a tracer having a movable finger. Such an arrangement is shown in Fig. 7.

In this figure, the pump ll, ll, lla may be identical with the preceding as-may also the cylinder 22, and the several conduits and saiety valve 38, excepting the conduit leading to the valve assembly A.

In Fig. 'I, a conduit Ill leads from pump ll to cylinder 22 but is provided with a branch Illa eading to the tracer I40, a return conduit I" eading from the tracer back to tank 32.

The tracer I40 consists of a valve body I dentical with the valve of assembly A except ;hat the valve plunger 45 is moved through the action of a movable finger I42, forming a por- ;ion of a rod I43 of suitable length. This rod s enclosed in an extension I44 of the valve housng from which it projects a short distance, the projecting end constituting the finger I 42. The ipper end of rod I43 coacts directly with the valve plunger 45.

At the lower end of extension I 44 where the rod passes out, the latter is provided with a conical portion I45 serving to maintain the rod within the extension and also providing a sloping surface which causes the rod to move endwise whenever the finger I42 is moved laterally. In order to facilitate such endwise movement, the edge of the opening I48, through which the rod projects, is preferably rounded as shown.

The adjustment and operation of the tracer I40 is the same as that already described for Figs. 1 to 6.

I am aware that the invention may be emv bodied in other specific forms without departing from the spirit or essential scope thereof, and I therefore desire the present embodiments to be considered in all respects as illustrative and not restrictive; reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

I claim:

1. In a duplicating cutting machine including means for moving the work and tool relatively toward and from each other and means for moving the one relatively past the other, and a pattern to be duplicated, a platform carried by the latter moving means and to which said pattern is fixed, mounting means for said platform constructed and arranged to provide for the latter a limited universal movement-relative to its carrier, a stationary finger element with which said pattern is adapted to contact when moved by said latter'moving means to thereby cause said relative movement on said universal mounting, and means actuated by the said relative movement of the platform to cause movement of the tool and work toward and from each other.

2. In a duplicating cutting machine wherein the cutting of the work is controlled by the action of a tracer upon a pattern, a stationary tracer finger, means for mounting said pattern so as to provide a small lateral movement, means for moving said pattern in a. direction parallel to the work so as to contact said finger and thereby cause said lateral movement, and means controlled by said lateral movement for caus-s ing movement of the pattern in a direction at right angles to the said parallel movement.

3. In a duplicating cutting machine wherein the cutting of the work is controlled by the actionof a tracer upon a pattern, a stationary tracer finger, means for mounting said pattern so as to provide a small lateral movement, means for moving said pattern in a direction parallel to the work so as to contact said finger and thereby cause said lateral movement, means controlled by said lateral movement for causin movement of the pattern in a direction at right angles to the said parallel movement, and means also controlled by said lateral movement for regulating the progress of said pattern in the said parallel movement.

4. In a duplicating cutting machine having a movable slide, a cutting tool and a pattern mounted on said slide and adapted to be moved past a workpiece and tracer finger respectively, means for mounting said pattern on said slide, said mounting means permitting a limited movement of the pattern relative to the slide, means for fixing the tracer against movement whereby contact of the tracer with the pattern causes movement of the latter relative to the slide, and means movable by said pattern in said relative movement for controlling the movement of said tool toward and from said workpiece.

' 5. In a duplicating cutting machine having a movable slide, a cutting tool and a pattern mounted on said slide and adapted to be moved past a workpiece and tracer finger respectively,

means for mounting said pattern on said slide, said mounting means permitting a limited movement of the pattern relative to the slide, means for fixing the tracer against movement, whereby contact of the tracer with the pattern causes movement of the latter relative to the slide, and

means movable by said pattern in said relative movement for controlling the movement of said tool toward and from said workpiece, and other means controlled by said relative movement for regulating the travel of the workpiece and pattern past the tool and tracer.

6. In a machine lathe having a tool slide movable lengthwise of the work and a tool carrier movable to and from said work, means for mounting a template upon said tool carrier and providing a limited movement relative thereto, a fixed tracer finger adapted to contact said template as sairLslide is moved and thereby cause said relative movement, a motor carried by said tool carrier for causing movement of said tool toward and from the work, and control means for said motor actuatable by said relative movement between said template and tool carrier.

'7. In a machine lathe having a tool slide movable lengthwise of the work and a tool carrier movable to and from said work, means for mounting a template upon said tool carrier and providing a limited movement relative thereto, means for moving said slide, a fixed tracer finger adapted to contact said template as said slide is moved and thereby cause said relative movement, a motor carried by said tool carrier for causing movement of said tool toward and from the work, control means for said motor actuatable by said relative movement between said template and tool carrier, and additional control means actuatable by said relative movement for regulating the movement of said slide lengthwise of the work.

8. In a-machine lathe, a tool slide movable lengthwise of the work and a tool carrier movable on said slide at right angles to said work. an hydraulic motor carried by said slide and arranged to move said carrier thereon, and control means for said motor, said control means consisting of a valvenarried by the tool carrier, 9. template carrier adjacent thereto and havin a template fixed thereon, a supporting bed for said carrier,'means for supporting said carrier in spaced relation above said bed and arranged to. permit a limited movement of said carrier with respect thereto, a. stationary element adapted to contact said template as the slide is moved, and means actuatable'by said template carrier to actuate said valve and thereby cause operation of said motor to move said tool carrlen' OSCAR BORJE ROSEN. 

